West Mersea sits at the southern tip of Mersea Island, where the River Blackwater opens into the Essex coast, and if you have not been before, an afternoon spent eating oysters on the waterfront there is one of the better day trips you can make from Colchester. The oyster beds around the island have been worked since Roman times, which makes this one of the oldest food traditions still running in the country. The Romans who were building Colchester would have known these waters well.
Two Thousand Years of Oysters
Colchester and oysters have been linked for as long as anyone can trace, and Mersea Island is where that connection becomes something you can taste. The Tollesbury and Mersea Native Oyster Fishery Company built a purification shed on the waterfront in 1876, after a national typhoid scare made it a legal requirement for all oysters sold in the country to be purified before sale. That shed still stands. Richard Haward bought it in 1985 and it became The Company Shed, which is now one of the best-known seafood restaurants in Essex and still very much a working building rather than a styled-up dining room.
The oysters themselves, Colchester Natives, are harvested from the shallow creeks and tidal flats around the island between September and April, using the same waters and broadly the same methods that have been in use for centuries.
Where to Eat
The Company Shed
The Company Shed sits right on the waterfront and makes no attempt to be anything other than what it is, a shed where you eat very fresh seafood at shared tables with a view of the water outside. Caroline Haward, who took over from her father in 2005, runs the kitchen, and the menu is short because it does not need to be long: native oysters from September to April, rock oysters year-round, grilled oysters, lobster soup, chilli squid, and whatever else has come in that morning.
It does not take bookings, so arriving early is the better strategy, particularly at weekends when the queue can build. There is a wine shop next door where you can buy a bottle to bring in, as the shed itself does not hold an alcohol licence, which is one of those details that catches people out on a first visit.
The Oyster Bar and the Rest of the Waterfront
The West Mersea Oyster Bar, also on Coast Road, is a more conventional setup with a broader menu of crab, lobster, grilled fish, and seafood platters alongside the oysters. It opens Wednesday to Sunday and is worth checking ahead for seasonal hours. Attached to it is the Mersea Island Fish Bar, which does fish and chips well and without any fuss.
Seafood at Dawn has built a following for its tapas-style approach to the catch, and The Coast Inn serves both seafood and local meats in a quieter setting. Between them, there is enough range on the island that you are not locked into a single option, and it is worth having a backup plan for busy weekends.
Natives and Rocks: Knowing the Difference
This is worth understanding before you go. Mersea Natives are the flat-shelled oysters, Ostrea edulis, and they are the ones with the reputation, carrying a mineral, briny complexity that draws people from well outside Essex. They are in season from September to April, and outside those months you will not find them on any menu on the island.
Rock oysters, the deeper-cupped Pacific variety, are available all year and are what most visitors eat on a summer trip. They are good in their own right, but if the native season is specifically what you are after, plan for autumn through to early spring, when the cooler waters seem to bring the flavour out. The Colchester Oyster Fishery at Pyefleet, a short drive from Mersea on the River Colne, also sells direct to the public and is worth knowing about if you want to take oysters home with you.
The Strood: Check the Tides Before You Set Off
Mersea Island is connected to the mainland by the Strood, a short causeway that crosses a tidal channel, and at high tides of 4.5 metres or above the road floods. This is not a warning you can afford to dismiss. People get caught on the Strood regularly, and depending on the tide height and wind, the road can be impassable for anywhere between thirty minutes and an hour and a half.
The highest tides tend to coincide with midday, roughly between noon and half past three, and outside those hours you are generally fine to cross without thinking about it. From Colchester town centre, the drive takes about twenty to twenty-five minutes via the B1025, so it is comfortably done as a half-day trip. Check the tide tables before you leave, and if you are visiting in summer, you can combine it with a walk along the Constable Country route from Colchester on a separate day.
Once You Have Eaten
West Mersea has a proper beach, a working boatyard, and several walks along the sea wall that are well worth doing after a long lunch. The coastline around the island is salt marsh, mudflat, and creek, and the views across the Blackwater estuary are wide and quiet in a way that makes it difficult to believe you are still in Essex. There are a handful of independent shops in the village, and the Mersea Oyster Festival, usually held in late summer at West Mersea Yacht Club, is worth timing a visit around if the dates work for you.
Dogs are welcome on the beach and along most of the coastal paths, which makes it a good outing if you are travelling with one.
Staying in the Area
If you are planning a day trip to Mersea, Colchester is the natural base. Number 11 and The Round House are both a short walk from Colchester town centre, with free parking outside, which makes the twenty-minute drive to the island straightforward. Both properties are dog-friendly, so if you are combining oysters with a walk along the sea wall, the dog is welcome to come along.
From Wivenhoe, Secret Cottage and Queens Cottage are about thirty minutes from Mersea by car, with free parking and the same welcome for dogs. If you would like to book directly through the Clever Cottages website, you avoid the platform fee and have direct contact with your host from the start.
Frequently Asked Questions
When is oyster season at West Mersea?
Native oysters are in season from September to April, and these are the ones most people travel for. Rock oysters are available year-round, so there is always something on the menu, but for the full native experience you want to aim for autumn or early spring.
Does the road to Mersea Island flood?
It does. The Strood, the causeway connecting the island to the mainland, floods at high tides above 4.5 metres. The road is typically covered for between thirty minutes and ninety minutes depending on the tide and wind. Check tide tables before you travel, particularly if you are planning a visit around the middle of the day.
Can you eat oysters at West Mersea without a reservation?
The Company Shed does not take bookings at all, so walk-ins are the only option, though the queue at weekends can be long enough to warrant arriving before it opens. The West Mersea Oyster Bar may accept reservations for larger groups, so it is worth checking ahead if you want a confirmed table.
How far is West Mersea from Colchester?
About twenty to twenty-five minutes by car via the B1025. The route is straightforward, but check the Strood tide times before you set off, especially if you are heading over around midday.
Are dogs welcome on Mersea Island?
Dogs are welcome on West Mersea beach and along most of the coastal paths, which is good news if you are staying in one of our dog-friendly properties and want to bring them along. Individual restaurants have their own policies on dogs inside, so check before you sit down.